From the case:
Left atrium and ventricle (Gray's illustration)
{"study":{"id":110518,"case_slug":"left-atrium-and-ventricle-grays-illustration","modality":"Diagram","series":[{"id":55792039,"content_type":"image/jpeg","frames":[{"id":55792039,"width":1600,"height":1600,"current":true}],"annotations":[],"encodings":{"original_dicom":null,"video":null,"thumbnailed_files":[{"tiny":"Gray-square.006_tiny.jpeg","jumbo":"Gray-square.006_jumbo.jpeg","small":"Gray-square.006_small.jpeg","thumb":"Gray-square.006_thumb.jpeg","medium":"Gray-square.006_medium.jpeg","gallery":"Gray-square.006_gallery.jpeg","big_gallery":"Gray-square.006_big_gallery.jpeg","original":"Gray-square.006.jpeg"}]},"perspective":null,"specifics":null}],"caption":{"us":null,"gb":null},"findings":{"us":"","gb":""},"contributor_login":"hackingc","case_id":92528,"case_key_image_id":null,"case_featured_at":null},"current_user":null,"access":{"can_edit":false,"can_download":true,"can_feature":false,"can_pin":true}}
Diagram of the internal features of the LA and LV.
Case Discussion
Original diagram from Gray's anatomy, now out of copyright. This diagram has been reproduced from Gray's Anatomy 20th US edition which has now lapsed into the public domain (https://commons.wikimedia.org/wiki/File:Gray496.png).